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Note 14 - Employee Benefit Plans - Summary of Accumulated Benefit Obligation (Details) - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023
Defined Benefit Plan, Accumulated Benefit Obligation	$ 3,541	$ 2,360
Aggregate market value	$ 3,370	$ 2,424

X

- Definition

Amount of aggregate market value of benefits attributed to employee service rendered

+ References

No definition available.

+ Details

Name:	cvti_DefinedBenefitPlanAggregateMarketValue
Namespace Prefix:	cvti_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

Amount of actuarial present value of benefits attributed to employee service rendered, excluding assumptions about future compensation level.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 715
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (e)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480506/715-20-50-1

+ Details

Name:	us-gaap_DefinedBenefitPlanAccumulatedBenefitObligation
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant